Outside linebacker Von Miller #58 of the Denver Broncos defends during a game against the Cleveland Browns at Sports Authority Field at Mile High on Dec. 23, 2012.

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Courtesy: Garrett Ellwood

DENVER - ESPN's Adam Schefter is reporting that Denver Broncos linebacker Von Miller will be suspended as soon as today for at least six games.

Miller was facing a 4-game suspension for allegedly violating the NFL's substance abuse policy, now ESPN is reporting that suspension will likely be six games. In 2011, Miller tested positive for marijuana and amphetamines, according to sources who talked to the Denver Post. As a result, Miller was placed in the league's intervention program. According to the league's drug policy, a player in the intervention program can be found in violation if he misses a test or repeatedly shows up late for testing or counseling, alters the sample or demonstrates behavioral issues.

Miller's representatives planned to appeal the suspension last Thursday. That meeting was moved to Tuesday. ESPN reported that while Miller and the Broncos are hoping to get the suspension reduced, it is not likely that Miller will go forward with an appeal.

The day before that initial appeal hearing, 7NEWS broke the story that Miller had been arrested Aug. 11 at the Centennial Gun Club on a failure to appear warrant.

Court records show Miller, 24, was arrested for not appearing at his court hearing on charges from last October when he was cited for careless driving, driving without a license and no proof of insurance.

A uniform summons and complaint document said the offense happened on the 12000 block of Easter Avenue in Foxfield, about four blocks from Miller's listed home address. The document did not elaborate on the nature of Miller's alleged careless driving.

Court records show Miller was scheduled for arraignment on Dec. 31, the day after the Broncos' final regular season game in Denver. He didn't attend the hearing and the arrest warrant was issued Jan. 2.

Arapahoe County Undersheriff Dave Welcher said his agency issues thousands of failure to appear warrants annually and focuses its resources on tracking down people with more serious warrants than a traffic infraction.

Walcher told 7NEWS that Miller went into the gun club Sunday and was found to have an outstanding warrant for his arrest.

An arrest document shows the Colorado Bureau of Investigation notified deputies that Miller was at the store. CBI conducts criminal background checks on people purchasing firearms, raising the possibility that Miller was flagged for the arrest warrant when he tried to buy a gun.

CBI spokeswoman Susan Medina said her agency cannot discuss firearm buyer background checks, because they are not public records.

Miller was booked and released on Sunday on a $1,000 bond, which records show was paid by his mother, Gloria Williams Miller. The Denver Broncos players had Sunday off from training camp.

The Broncos issued a statement Wednesday afternoon that said, "We have been aware of the matter involving Von Miller’s failure to appear in court for traffic violations. It was reported to the league earlier this week and is being handled through the legal system."